[solved] Cannot enable gzip compression.

Hi!
I would appreciate any help on this one:http://www.zenmony.com/okinawa-fucoidan-c8/
In my LiteSpeed config gzip compression seems to be enabled, but when I cheched response headers I do not see Content-Encoding: gzip.
Also I would like to hide or change these response headers:
Server: LiteSpeed
X-Powered-By: PHP/5.3.23

Thanks for telling. Yes, I had to enable gzip in php.ini
zlib.output_compression = On
Now I can see it works with html and text,
but I still don't see gzip header with css and js files.
Is it the way it should be?
Thanks.